As　a　new　absorption　refrigeration　system,　NaSCN-NH3　diffusion　absorption　refrigeration　system　uses　a　solution　of　an　inorganic　salt　compound　as　the　absorbent,　ammonia　as　the　refrigerant.　This　paper　presents　some　parameters　that　affecting　on　the　performance　of　NaSCN-NH3　diffusion　absorption　refrigeration　system.　By　comparing　simulation　and　experimental　data,　the　results　show　that　the　COP　of　NaSCN-NH3　diffusion　absorption　refrigeration　device　set　to　2　kW　cooling　capacity　can　reach　0.4,　when　the　regeneration　temperature　is　80　degrees　C　similar　to　105　degrees　C,　the　concentration　is　0.38　similar　to　0.5　and　condensation　temperature　is　30　degrees　C.